Sheen, 48, told Jay Leno Wednesday, "One of our primary characters, Selma Blair, who played Kate, was written out because [the show] was not about our relationship, and the problem was too many people were still excited about the 'Two and a Half Men' character and thought the 'Anger Management' character was a little dull."
"So, um, that is not the case anymore. Her character leaves, and I start circling the drain. So it's really fun to watch and hella fun to play," the actor said, adding that he now refers to the series as "Anger Management 2.0 - the reboot."
Blair, who played Sheen's love interest, exited the show in June. Sources told The Hollywood Reporter that she was dismissed by Sheen via a profanity-laced text after she reportedly questioned his work ethic on the series.
Sheen was famously fired from "Two And a Half Men" two years ago after falling out with show creator Chuck Lorre.